39142091 has 2 divisors, whose sum is σ = 39142092. Its totient is φ = 39142090.

The previous prime is 39142073. The next prime is 39142097. The reversal of 39142091 is 19024193.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (19024193) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 39142091 - 2¹⁴ = 39125707 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (39142097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19571045 + 19571046.

It is an arithmetic number, because the mean of its divisors is an integer number (19571046).

Almost surely, 2^39142091 is an apocalyptic number.

39142091 is a deficient number, since it is larger than the sum of its proper divisors (1).

39142091 is an equidigital number, since it uses as much as digits as its factorization.

39142091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 39142091 is about 6256.3640399197. The cubic root of 39142091 is about 339.5324918311.

The spelling of 39142091 in words is "thirty-nine million, one hundred forty-two thousand, ninety-one".